by mistake I just figured out a really simple way to figure out what your key hash is. While setting up a new computer I forgot to generate a keyhash before running the FriendPickerSample from the facebook SDK and I got a message when the sample app opened up on my phone it said. keyhash XXXXXXXX has not been setup by apps developer. From there you can just add the keyhash you see in the XXX to your list and your ready to go.